Electric-arc lamp



(No Model.) 3 Sheets-Sheet H. O. SWOBODA.

ELECTRIC ARC LAMP.

No. 533,100. Patented Ja,11:29,1895,

3 SheetsSheet 2.

(No Model.)

H. O. SWOBODA.

ELECTRIC ARC LAMP.

Patented Jan; 29, 1895.

(No Model.) 3 Sheets-Sheet 3.

H. O. SWOBODA.

ELECTRIC ARC LAMP.

No. 533,100. Patented Jan. 29,1895.

INVENTOR A; ATTORNEY UNITED STATES PATENT QFFICE.

HANS OTTO SWOBODA, OF NEIV YORK, N. Y., ASSIGNOR TO THE GENERAL aINOANDESOENT ARC LIGHT COMPANY, OF NEW YORK.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 533,100, dated January29, 1895. Application filed March 2, 1894- Serial No, 502,047. (NomodeL) To all whom it may concern;

Be it known that I, HANS Orrro SWOBODA, a subject of the Emperor ofGermany, residing in the city of New York, in the county and State ofNew York, have invented a certain new and useful Improvement inElectric- Arc Lamps, of which the following is a specification.

I will describe a lamp embodying my invention and then point out thenovel features in claims.

In the accompanying drawings, Figure 1 is a side elevation of alampembodying my improvement. Fig.2 is a side view of the lamp in a plane atright angles to Fig. 1. Fig. 3 is a side elevation of certain parts onthe opposite side of the lamp to that which is illustrated in Fig. 1.Fig. 4 is a vertical section of an armature or core of modified construction. Fig. 5 is a side view of certain'parts of the lamp illustrating amodification. Fig:6 is a side view of certain parts of the lampillustrating a modification. Fig. 7 is a top view of the body piece of aspool for a solenoid. Fig. 8 is a plan of a detachable flange for saidspool. Fig. 9 is a perspective View illustrating the manner in which thedetachable flange may be engaged with the body piece of the spool.

Similar letters of reference designate corresponding parts in all thefigures.

As my improvement does not relate to the circuit of the lamp or to theconstruction of the frame, I shall not describe these features exceptincidentally in explaining other parts.

A A designate two rods extending from a plate A down to a holder for thelower carbon. As the latter may be of any suitable construction, I havenot shown it. One of the rods A A may be hollow to receive a circuitwire B, covered with insulating material.

C designates another plate which is connected to the plate A, by meansof intermediate rods, or otherwise. It is shown as hav ing a central hubin which a rod D, is fitted. The rod D may serve as a support for thelamp. I have shown the plate 0 as provided with binding screws 0' o forthe.connection of the circuit or line wires leading to and from thelamp. I may add that both these binding screws are insulated from theplate 0. The wire B. is connected with the binding screw 0.

I will now particularly describe the form of lamp illustrated by Figs.1, 2, 8 and 4.

E designates a rod which is to be provided at the lower end with aholder for the upper carbon, its office being to supportsaid carbon. Itwill be seen that this rod is provided with a rack e on one side andthat it moves upwardly through a hole in the center of the plate A. Itmay be guided by a bearing in a plate F, which is mounted upon the plateA, and also by a bearing in a plate F which is supported above the plateF and connected with it by means of two vertical plates or pieces F F.This rod may also pass upwardly through the plate 0 and into the rod D,providing the latter is made tubular, which will preferably be the case.The downward movement of the rod may be limited by a stop-pin arrangedin its upper portion, so that it may contact with the plate F.

\Vith the rack e of the rod E, engages a gear wheel G, which issupported in bearings with which the side pieces F F are provided. Ashere shown these bearings consist ofscrews passing through the sidepieces and engaging with the ends of a shaft g, upon which the said gearwheel is affixed.

The shaft 9 forms a support for an oscillating frame H, here shown asconsisting of two angular or L-shaped side pieces h 71 and intermediatecross-pieces or stretchers 7L3. As here shown, these side pieces areloosely mounted upon this frame and loosely mounted upon the said shaftg.

G designates a pinion affixed to a shaft g journaled in the side piecesof the frame H. On the same shaft is affixed a gear wheel G hen the rodE is moved in either direction, it will rotate the pinion G, andconsequently the gear Wheel G The gear wheel G engages with a pinion Gaffixed to a shaft 9 which is journaled in bearings in the side piecesof the frame H. On the shaft 9 is affixed a brake wheel G and with thisI combine a brake lever G having one arm which is curved to conform tothe periphery of the brake wheel. If desired, one of these parts may begrooved and the other constructed to enter such groove. The brake leverG is fulcrumed by a screw or pin g to one of the side pieces of theframe H. One of the arms of the lever is connected to a spring 9 whichis 5 also connected to the frame H. Of course, if

the lever is properly weighted the spring may bedispensedwith.Thespringisso combined with the lever as to apply it to the brake wheelwhen the frame H is in that position which it occupies when there is nocurrent on the lamp and at such times as there is a great resistance inthe arc. That end of the brake lever which acts upon the brake wheel, isshown as provided with a projection 9 which may be made in the form ofan adjustable screw, engaging with a tapped hole in the end portion ofsaid lever. The stationary frame F F F F is provided with a projectionf. When the frame H rocks forward, the projection g impinges against theprojection f, and thus the brake lever will be operated so as to releasethe brake wheel, whereupon the upper carbon may feed downwardly. W'henthe frame H is oscillated in the reverse direction, the projection willleave the projectionf, and the spring will apply the brake lever againto the brake wheel.

The frame H is connected with the core or armature J of a solenoid ormagnet J. \Vhen made for an alternating current lamp this core J iscomposed of a number of iron wires j, insulated from each other in anysnitable manner, as, for instance, by being coated or oxidized. Ifdesired, these wires may all be surrounded by a single glass sleeve.These wiresj are fitted at their ends into cappieces j'j which may bemade of insulating material or metal, but if metal is employed and thelamp is intended for an alternating current, there should be a split ineach of the cap-pieces lengthwise of the core and to the center. I donot want to be limited, however, to the use of a core made in thismanner, as I may use a solid iron core, or a laminated iron core. If asolid iron core is used and the lamp is employed for an alternatingcurrent, the core should be split lengthwise.

The core J works within the solenoid or magnet J, which may have aseries or differential winding. This winding will be connected in thelamp circuit in any suitable manner. As here shown, one of the wiresextending from the winding connects with one of the side pieces F F ofthe frame F F net, instead of the solenoid form, maybe em F Obviously,the horseshoe form of mag be allowed to move downward so as to lower theupper carbon. On moving down far enough, it will cause the gearing to bereleased, so that the rod E may feed downward.

Preferably a dash-pot K will be combined with the frame H and somestationary part of the lamp frame. 111 the present instance its cylinderis connected to an appurtenance of one of the side pieces F F of theframe F F F F, and its piston to a lateral extension on the frame H. Thepurpose of this dashpot is to prevent too sudden movements of the frameH.

In the form of lamp shown by Figs. 1 and 2, the circuit extends throughthe frame F F F F and from such frame, by means of a metal brush L, tothe rod E, which carries the upper carbon.

The frame H while, generally speaking, being L-shaped as in the firstdescribed example of my improvement, may have its arm h, which extendsin the main horizontally, adjustable relatively to the other arm h Ashere shown, both arms are loosely mounted upon the shaft g and the sidepieces of the frame constituting the arm h, lap over the side piecesconstituting the arm 71,2, and where the lap occurs, the side piecesconstituting the arm 7i have arc-shaped slots 72. that are concentricwith the shaft 9 and are combined with clamping screws 7L5. By thisconstruction of the L shaped frame ll, provision is afforded foradjusting its two arms relatively to each other at different angles, andthus the lamp may be varied to suit different currents, for, obviously,the more the upright arm on the L-shaped frame H is adjusted outwardly,or, in other words, toward a horizontal position, the greater effectwill its weight have in opposing the magnet or solenoid J.

For connecting the frame H, with tho armature or core of the magnet orsolenoid, I use a link L, having a pivotal connection at one end withthe frame H, and provided with a longitudinal row of holes which affordprovision for engaging the link at different points in its length, withthe armature or core, by means of a transverse pin passing through ahole in the armature or core and one of the holes in the link. Bychanging the point of connection between the link and the core,provision is afforded for tilting the frame II more or less, to vary theopposing force which its weight offers to the magnet or solenoid.

It is not necessary to make the frame H adj ustable in itself, ifprovision is afforded for adjusting its connection with the armature orcore.

Turning now to Fig. 5, it is only necessary to say that it illustratesthe substitution for the rack bar and gear wheel E, G of a spring barrelM, having its periphery constructed on the principle of a fusee barrel,or, in other words, with a groove of varying diameter, so as to equalizethe varying action of the spring, and a cord or strap wound upon saidspring IIO barrel and connected with a carbon support or carrier, whichwill be provided with the holder for the upper carbon. This carrier isfitted to any suitable frame Work, so as to be properly guided in itsmovements. It is intended to be heavy enough to overcome the tension ofthe spring barrel, so that whenever it is unrestrained it will descend.

In Fig. 6, I have shown two movable carbon supports or carriers N Nwhich will be provided with holders for upper and lower carbons. Thesecarriers are fitted to any suit able frame-work N, so as to be properlyguidedin their movements. N is a guard or equivalen t device, connectedat the ends to the two carriers N N and intermediately passed around awheel N The upper carbon carrier N is intended to be heavier than thelower, so that whenever it is unrestrained it will descend and by itsdescent raise the lower carbon. The Wheel N is intended to be mountedupon a shaft corresponding to the shaft 9 in the lamps alreadydescribed, and to be controlled in its movements by a train of wheelssuch as I have illustrated in the two different examples of myimprovement shown by Figs. 1, 2, 3 and 4, in connection with a magnet orsolenoid with an armature or core.

The drum which I have described in connection with Fig. 6, is to allintents and purposes, a wheel which is connected with a movable supportfor a carbon and hence it corresponds in effect with the wheel G,illustrated in the first and second examples of my improvement. Thewheel of Fig. 7 also corresponds with the said drum and with the saidwheel G, in the sense of being a wheel which is connected with a movablesupport for a carbon. Each of these devices may be designated as adevice for controlling a movable support for a carbon.

I have shown the solenoid as provided with a spool S, having a body 8made of metal, with flanges s, s at the top and bottom. When the lamp isintended for an alternating current the body of this spool will be splitlengthwise from end to end, in the manner represented at the lowerportion in Fig. 2. In addition to the flanges 8' the spool may havelarge flanges of insulating material 8 s, and these may he slipped overthe up per flange 8, if such upper flange be notched in the mannerrepresented in Fig. 7 and the flanges are notched in the mannerrepresented in Fig.8, for then each flange may be slipped over theflange s in the manner indicated in Fig. 9.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In an arc lamp, the combination of a movable carbon support,stationary supporting pieces, a tilting frame pivotally supported insaid stationary supporting pieces, a pivoted arm for moving said tiltingframe, ad justably attached thereto and having its pivotal axisidentical with the axis of movement of said tilting frame, a brake andbrake wheel carried by said tiltingframe and moving with the latter whenthe same is moved, mechanism connecting the brake wheel with the movablecarbon support, a magnet or solenoid for moving said tilting frame bymeans of said adjustable arm, and a fixed stop for coacting with anadjustable extension of said brake, substantially as specified.

2. In an arc lamp, the combination of a movable carbon support, a devicefor controlling the movement of such support, a tilting frame, and asolenoid whose core controls the movement of the tilting frame, saidsolenoid including a spool having a body portion and removable endflanges, said body portion be ing so formed as to permit the suitablynotched flanges to he slipped on, and locked on a partial rotation ofthe same, substantially as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

IIANS OTTO SWOBODA.

Witnesses:

EDWIN H. BROWN, ANTHONY GREF.

